Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1107fdd4e1eb921fb90114deecc78f0994c1179a76561019a9bcd42532549d2' 
  AND token = 'nAkg4R4Uy2aEZKtfcGo4be+xbG3AoDvYI5EMBjgkKqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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