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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '001dba1a702c3873fd0ad8b2c7a3f35757ad7cf7c1932e6899ea89b469018b5b' 
  AND token = 'NPJMTI80BNfBcm7P/U2D1jmcDL1PA74OYJQVL7JtyLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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