Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f670ccd81d34bae36a975be110b9d294bad9bb65dd76f3738c475636809375a' 
  AND token = 'Gl4AtyRNXTHr2JGQBVTh/Bx9eFAOprekZJy+TTKhJd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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