Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26f6acef6e68d7e365df9e9ae9de222eebef2b7e3282ffa90d6f5f5855ad205b' 
  AND token = 'e/2hy3pFV9NWN27BBan4+Kijqs/ek3NyYMns6tA4cGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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