Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1febf17ae3ab873cbeba9baf559a234a9f655ee18939e756ef77ea38b7e4a7e' 
  AND token = 'jpheghVWN7DDeAT3Fg0NJH2v+wcumbVekiO4WxHBwoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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