Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4be7f0274b22c0670ead3c499097465a632aa53bb010440e9c74e6953ad1392' 
  AND token = 'OqPW4SKGA/+xIYFwRm/UYOSLHbWXDdU0bKcKoAIdQGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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