Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33a7296f9fc1af1234cb6f6aa8be0d92dbb7034fc5132978ce4860b6296592c4' 
  AND token = '8QFIyODYtmfafWgLl0AZ9yHePO2N3dsteHMGMfTx+pM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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