Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '260aa6de42d9c01fe4ab9a49cb474f7d928f75233072df07f26abee3c1fecbdd' 
  AND token = 'EJat4lFix7wzVv7Hd/FKmmBaJc7yaA9trbSsf3aqhwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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