Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '405dd2ade760b993cb5334f52ca8607603925ebadc7715656a422a8bcae99f1e' 
  AND token = 'XbyQc9ZUMEEDsEC71F2qNGawm1EZBFWuAxLO9i8gRLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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