SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67d9463f3f28d971aca7b0bfd44f2449033146187755d8ab4989511be5f32318' 
  AND token = 'sVuuglkGSdAZ2Y9+UbMQbVcP7ni9HfBjNljyGqS5Q/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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