Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ee425a063ea1b1ea024ef4d29620e48cef406b4c7e0a8cc8d9772f2d4c8c848' 
  AND token = '9scgGKUisidBR1E1lVJazr+sEqw+pEUHnSrEfvvrlwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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