Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f661c12c1ce5b4dc657f013118abda3eb4e313b189abcb41295dfd6b21b19b7' 
  AND token = 'wqkpNC2aAhGXiq3SAxRCxPLIAVpENdS1O0dPLKUYqsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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