Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac6d90690305ce5c6487b3335748c7b805fc164d9759df33ff3fad8d6934427' 
  AND token = 'jnwl4z134IYECE9e6MuNCjFm1jQ3tu27u3144RzNm1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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