Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '42ee4ba6623d5695566678e60b91c35d41a8053d58194d49792caed9e663fcaf' 
  AND token = '/QVhkeV7zrwoVtycY21FRi4W8Ni6mJvH94loC1v+a2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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