Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1387474c55ee314fdba4b2e384aea99bd49921b58bee1b27d213ce427b61068' 
  AND token = 'wP7F+2DQrXpo+30vd/lGxjCMDIf5/zD7aSD0GvvlBmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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