Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3239c39cc6ad7688e7eb0690f0a455b48cc337884979f24084f8008220908038' 
  AND token = 'mow7VoC1RyVdG+YDBD9dmkNR+Lrr3gog53j3fBcD9pI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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