Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0889138500badd8401b2316fc739a4790e80cdda8d63b235943e1d9a86b695c1' 
  AND token = '55KHq2PldF95DwXqR66dYTWztsD2VK+Tl6yieuODVn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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