Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3551bac3b8971dd20aa0a52587001117cbea463f42d38d1132ee9a9d4228428' 
  AND token = 'Gnlwlsts1O6ChRJdti5j2haWrM+Ps7XNq1XdN6GFB9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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