Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aba6be744b864f3d583e34df60f6dd1d4112797e6e99cf8d5e48f1db0263426' 
  AND token = 'fjD0raia/ays7/FUeWDSSxQOsEQ9tGPzn7o6PqZq9gI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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