Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e55bf6494d49dc840270ab63f282e50426dceda498258a416b64e7986fc62d77' 
  AND token = 'QOvir9Vh+HUyWUy57kjZ2HUE0xpiva6w82gTwGpb94M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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