SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0332821457b7293f3e89be99b0649f2d306bdf1a176f0001921c4b918c34c8ca' 
  AND token = 'f5FxJomUZNplDaxhd9QKpUGrzTZPzCJGwGY1ffLiMCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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