Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7eef13ca26bc0adc74129f503471a8a773b094e98b91b326e123ccf097d1a96' 
  AND token = 'k9KZLrp094UAJwdx4Id9xkjdiKJQKITqSJYfFV6DHKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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