Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '651d0483f7234d8ca9da786ea03f815c0b32e619ee694a5326570330c99e15bc' 
  AND token = 'nWJ1I6SGoNDk56JcaokmRxnqtQSl73TM/JSUN7FzYj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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