Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19ac4b5320f5dbd30a2a0148b1a45f4a9d1ed843db113b564caac62d147dbe87' 
  AND token = 'uVdowl1Cyo/vjktFazhU+l2xVDAX8wMeqv+ycEa6/eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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