Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c065225f1f340b6664994b28c6c7b553a8662427613329a553acc1c0364863f' 
  AND token = 'XBtuyCGXRE2NmQLlwa3belVbCm7ex5KXGqpj7dDj1Zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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