Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42573debb576ef988d542317c99504dd943ed15edbbc5137713f21962bc96232' 
  AND token = '94wTK7oT43F/Ymy1fnogPULNqY2s8Iw6Cv74HO9WQNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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