Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '419a327fe7e445159989ac0dd2e17818ecb0566649a7c29ed2e49b25185c0f59' 
  AND token = '3flhqTWbTEIh+b49/8Thahg2oKqpSQznxlDOe/hTR0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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