Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a84b944c017d22c89f20579e36db291403ad7b04714598f6325629c64cebfc0' 
  AND token = '5MBe3MuCVYB2jMLENA0+lL05OnYMC/jM3GNeOggri7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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