Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1d9c3323ac292ec90b641e80eb33b0a05763039e3da819aafb1c039322dcc9e' 
  AND token = 'QbNU6SvYYarxl1a6bisBKNsURQC/Gu5Y8lTQ7tMKbsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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