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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09c65814064b578e97dea287ac96d362780c61e43a348c20fe0d622782615bcc' 
  AND token = 'AQZ9ngjppEfdm1mzioph451sBwKdRemUUF8uUnHQyJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}