Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '078a7352e6aa5d6ab2276673be5d09ae8c8dfee6a9f88016fa6891da3fb6e372' 
  AND token = '2romZ6fLlwlWgOuQ+6wiajq5NuykWg1gHfvEpFQoGE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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