SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '014977fc21706b699967bd7b8a3f1ce5095f0e409a325d65b5576168c241521f' 
  AND token = 'g87pulrZw+yHNK0CfmnKYbABOZSwCgco/7Vo7hjdkXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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