Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '881f8ca1239fcad99892c900ee78718a0829da18fa08cdadca17def4168e0114' 
  AND token = 'VKEtASx+C0gZTB+HbNuiOQMKEKNUB9oZ0ZzackLMhCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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