Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '665dd7aab8688d7f26e414d482306fca82739608798d6e51f1df7e7fa6d2a686' 
  AND token = 'muFZvvcMHWmhNyrvL4eC32MwDG9CoZhb61tyeuakxlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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