Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7f7ba9c3c71c3f10e71c93901eb05e711292ac18311165671af517d73119a74' 
  AND token = 'meTwFHTDR5XcI86n+Zy9yh5XDBA6hBYkdtScYoNrKRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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