Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c28d465a343c6abe89005d2f935098c9b95da9c17c6b28aff6d1c3a27ff9eb9a' 
  AND token = 'DP4YVE+drC9usKg2baJBd+lefzsFmcwMsk5nwjQUbTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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