Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd548c0265e230ff739a024505396a987d52cec17cd1221ad37f74b2e6deacc49' 
  AND token = 'ZAAP5i93YiZCZ+elWsk85n/tImclIdxs5K2s/O4+NZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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