Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95fb924d64a2009a94600f5e436dbe93a9f678ce03ca137181917d4e2ec89d1c' 
  AND token = 'QyjCroqQblIRjIM9Xv1YWuU1CXoCyoWJcUlkff+gwzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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