Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '906181877672fc43508d24edf0273658082716387bba232f415b5c2d03de38ac' 
  AND token = 'WYgjlRwaVIxXmZbNoJMabZ1CEFm7aarXaJOFBUgNAN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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