Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '408c5f662e26ec6ce120474f89d309fecfd46a71c2e7f13d14d281baf19ba7c1' 
  AND token = 'YOgk755e80JV7aFdl/c564LRdIeHb3H8i05VgRid/TQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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