Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5202e49133d33a44ee7b3698121635c675b6da6000f3bda0a2f77ba80c758c59' 
  AND token = 'vvadj5F+YLkNBpUbf4mv2PYZDxO7diHucP8BFn0hUDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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