Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a95e3286c4a8fbb2aa10275adb086cfd340fcc520a0223ae463daebd3722a54e' 
  AND token = 'hAh+5LyASSyxtJZYQei0GHLLp7dOEWwE3kDMF9O8UPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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