Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e7c3fc4de5ab03af4f0e27ec6c6ba9658ddd1284aff75913615e6cab88ca8e8' 
  AND token = 'g6WDhvPsL4OTPo1GnMVRwwTIfg5Wnav7DZHEBQxvD3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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