Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4996034e6b24d93884959b475c59ad6d24dd28bc42e0bf5f6a410ffce94b3fd' 
  AND token = '6oTF8EUmc3ypBqTW5ToUt8sAHyBkgNJN2KitCuo1B5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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