Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a85a4f91b232747bc099b56fe6910fe81cff89ce1afbe08a3249fda35408cae' 
  AND token = 'OtWX9TppX29T7N67zN6Z71uvMdWr3LZmseTXOUNQOOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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