Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bbc7c9798b43123cfab4fa6a8670e03d0adc12bee8baab444b4e92c68b54ea3' 
  AND token = '8ZaYZQYqj9PD2KLm6T6hKK6EyGKRVFeTXw2qyIIAIQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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