SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f09d102112170d606c34f0159191e0a772b8176f43185b95bb7a73b5d53ef6fe' 
  AND token = 'pH/dgjkxCWq+0HyFzHAyEYJSwHQgni8JnfetW5FVzhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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