Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddbe4c1ac3070069fefe7f21134c99db5031696d36f6d521d60b623307fcc2fe' 
  AND token = 'GHTKCYoOApR2xaiCYy/72OYV0g8IAp43VIPVHOJuyP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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