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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b030ebd5d5ce14ae71f8bc27f735ad8186c058f5bfb39fcf9bf7259ccc00a1fd' 
  AND token = 'd1pBCpYWSg9Y0GXy2qqEUcTOGZzZf0RMr03fdHMUAz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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