Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '741cd7e1a407c28bec68fefdf87f7e3e1cd0884f91f480d657b7f01ce1199ad4' 
  AND token = 'mVjjqYlimvFD8FvJV3tUOKNgTbEoHvq7yUJfoB314Mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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