Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9da8643392bcb4288855cf3d275979c21c95697a0c5d52e8fe00953f87920e2' 
  AND token = 'NRo4gSSzAa8BJe4pyuddJbdjSwxE3JYneOgHShFuJvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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