Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8626a49a6f307520efef8c84e49cc61a672e2790c84e4fa83d679ff89e7906ed' 
  AND token = 'lg73dhiPSlPdIhvvhNGCjhoimo/Smq+FP0XKSt4/0pE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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