SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa8dbdbb04be4611968924145ca5bf99d1c95b277c043940f6758febb8d168b5' 
  AND token = 'KPd/tWznB/U7q1IfBuQ+rl9ElsqI/P/3EVhj/+rkteY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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