Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9a7b92e8ab2c15ace2c59ac7ef124e340852b2262b492df929b4133b424be74d' 
  AND token = 'flc89Xj72eAayyNfbRa9mG8NXbXQAm1K0Ubcffdt58k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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