Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c17599143b712f80f96fdf601d15616cc187e7877e3e5180ba1e6f341ae0c5' 
  AND token = 'lnk2gX8Q8AhV/yHG/IfEDvQLbEiTtVbB6m/Z3EnwC30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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