Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e9cd1ad7da296ffe170e068fa24a365c8c9b931a515f267d9da94ec82a33dec' 
  AND token = '4gKK+uasNRR+RATp0aSJhlk7IswL8yA1IlBBWuSLH8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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