Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c01c93c2fa2a1d0f3e12af7b244542c2a686c8d7c12107d4901df8ba3f3998b1' 
  AND token = 'mpWkmYJWqrZXMW9TTCo5jk3eYvL+vkMt6VcVaqjtU8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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