Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93b60b81a5e500203d9e5529a1a3702295ca561f01b6e4e3bea7ba909f2f89cf' 
  AND token = '7J8XAkimhblxXkUVHwkJ/1Po6mDKZN96YPqjw1L5qH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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