Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07834e27e983125043af992ea5d1a6c263a89e905bf8c4084d4a41cb80a05a98' 
  AND token = 'sQJ6AWXadvRRtcPnEeTymguoVhPvytiv1mDDVltxbUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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