Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '696c92eebcf4733f859cb8a49be1874be5bb98c5d34543abbeefdff84b0007f7' 
  AND token = '5/v6EGbkbjfAEeaIPraAr1bbBYPnLMGTV0CTXAMrzeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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