Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88d82a0156393a37d629f668edf3de601170692d79aedd04c111e348cee26a4a' 
  AND token = 'rBX0b3oPvHSq3PsWiAvCGPEtrbvlGy7+IQnXp3QSB/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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