Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e97101231d8119e9dd855147fd011da62f142cb8b722d73555c33c2ef7e26c6e' 
  AND token = 'xYucxgr15TSczZ71cyEaes1OsjfZ1xhtz0YMM3Ssr/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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