Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83eca2879bc9ea938cdf73fd3a49ea6ed1e65be2c7f6fc26bc3723edc81cf544' 
  AND token = 'usYzlzqUg+8orLClSFeU0pRyiT6G3zMGLm/ZKMWLmH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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