Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067ad0c28080b98d6ad5d91b1069c5e15b474c11f9b72f7ac3a2bd97ada44676' 
  AND token = 'VKgMi3mzh93AIbGhx+3atm7ybwahZKibj4S5PfHG0YY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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