Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2fe5953e8be92751d0d21add8db81dfcde8a148282ba9830ee15159e4ff5118' 
  AND token = 'dsExVSVt+HQUN/KW89eLlcPB4c76/dUi66SDP4LYpoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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