Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '141a544d1b0d51ce90f35a7c4a91d9584902f1e0f41e53a8e6c375a3588451e4' 
  AND token = '0xbbHZEx7Ox1Cn4DXGktBxsLokDD4/5mvwEYXyupHkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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