Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ef71104f74fcf872a32aaffab4f779332b0981a087bc819399cf29e709d8cb' 
  AND token = '1kaPnyAgALxhfH5yKzucuqo2KPL+aISaYtO3Gl8vUm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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