Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03bb12a9550d85251f3014f472691ff052d4c197335d5f553986f3fd4c437bff' 
  AND token = 'Kt6/LE9qfxwAX9Y7IFAVqJBJcBPV4ydgs7EccIA0ajw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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