Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86ce257d1d662ed29a34902e334646e98d3cb4324bd9fd55d6ba2404f02f32ca' 
  AND token = 'CyStpbQd4PaOHT0uuEkbhmk3yGffMclsVJZgg8iVe1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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