Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '922239b4004cc89a06f99d7a0f2cda0eaea1ee77db413d4346b2c0e15b8bd622' 
  AND token = 'mhqJXqV2pjbAUkFsC3UnaV0t+F588H8XUNEhc0P3FxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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