Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53b4a6bb839c6d4f777fd3fa4be2101f3f7f230bf6a876fcaae0a00ea5135e32' 
  AND token = '4BW+ej8Xr7Eub6zI2McseQQRSCiD5vA/foKoq9sKqUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}