Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae6ad186550d6d25553dab2b295c81b361646a92f4ba447fc2d754961b054f9f' 
  AND token = 'OwyTjUGVrIOuQ8xe6uPJ0STwTlaBzHUtUA8pjM0BuY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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