Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6132088308830f3129a26714447099802453d23d3a79cdb807b724e6fa101989' 
  AND token = '3ki7JTyr11KRN0HHyKJ6tGhNuMeStgyMbAR41+ijr60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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