Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '194a24e7a04f4d55e99bf15f2dfe9871b543fb23f14f174d0ec2af7cd366c3eb' 
  AND token = 'wtKqcyRh8Mk/JH4eZSqvyoDIyEuy+iFwqtVF4zi/zoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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